You do \(\frac{sin(y)}{2} = \frac{sin30}{what you got for x}\) and then cross multiply and simply it.
\((what you got for x)sin(y)=2sin30\)
divide (what you got for x) to both side
you should get something like \(sin(y)= \frac{2sin30}{what you got for x}\)
then just use a calculator and do \(sin^{-1} ( \frac{2sin30}{what you got for x} )\)
